Judd–Ofelt analysis and improvement of thermal and optical properties of tellurite glasses by adding P2O5

Structural and spectroscopic behavior of Er3+/Yb3+ co-doped boro-tellurite glasses

“…These changes indicate that the presence of Yb 3+ ion in the glass medium disturbs the environment around the Er 3+ ion site [35]. It further confirms that the asymmetry of the ligand environment around the Er 3+ ion site in the prepared glasses is found to decrease with the increase in Yb 3+ ion concentration.…”

“…Since Yb 3+ ion has a much broader absorption band from 870 to 1060 nm, the absorption cross-section of the Yb 3+ ion at this band is 10 times larger than that of the Er 3+ ion [35]. It can be suggested that the addition of Yb 2 O 3 to the Er 3+ doped glass matrix enhances the pumping efficiency of 980 nm laser diode (LD) through the energy transfer (ET) from Yb 3+ ion to Er 3+ ion via: 2 F 5/2 (Yb 3+ ) + 4 I 15/2 (Er 3+ ) → 2 F 7/2 (Yb 3+ ) + 4 I 11/2 (Er 3+ ) transition and hence the energy transfer efficiently plays an important role in Er 3+ /Yb 3+ co-doped glasses [36].…”

On observation of the downconversion mechanism in Er3+/Yb3+ co-doped tellurite glass using thermal and optical parameters

“…In this setup, an argon laser tuned at 488 nm was used as the excitation source, and a HeNe laser at 632.8 nm was used as a probe. Further details of the TLS methodology have been described previously [21]. in Fig.…”

Upconversion white luminescence of TeO2:Tm3+/Er3+/Yb3+ nanoparticles

“…Selecting a suitable host is a key factor for upconversion luminescent materials. It is well known that TeO 2 (optical fibers, crystals and glassy) are suitable host materials due to their lower phonon frequency, chemical durability and thermal stability [20][21][22][23][24][25][26][27][28][29]. The conventional processing is using bulk TeO 2 or TeO 2 glasses as the host materials for preparing upconversion luminescent materials [9,30,31] [31].…”